Method of making ventilator-terminals.



B. H. MORRIS.

METHOD OF MAKING VENTILATOR TERMINALS.

APPLICATION FILED FEB 26. I916.

LQ 3AS7Q Patented. Oct. 16, 12m.

2 SHEETSSHEET 1.

ATTORNEY? B. H, MORRIS.

METHOD OF MAKING VENTILATOR TERMINALS.

APPUCATION FILED FEB, 26. 1916.

Lfi fi m Patented Oct. 16, 1917.

2 SHEETSSHEET 2.

WITNESSES sun' BEEN]? H. MORRIS, OF NEWPORT NEWS, VIRGA.

WTHOD OF "MAKING VEETILATOBr-TEE'EINALS.

Specification of Letters Patent.

Patented @ctu in, limb.

Application filed February 28, 191%. Serial Ts'o. @3595.

useful Method of Making Ventilator-Ter minals of which. the following is a. specili cation,

My present invention consists of a novel method of making ventilator terminals. wherein tubular sections are formed and articulated together in a novel manner.

It further consists of a novel method of making a curved tubular-section for a ventilator terminal wherein circular sections, of semi-tubular form in cross-section, are first shaped from sheet-metal blanks and then welded together to form an annular tube and thereaften the tubeis cut, preferably on redial lines, in accordance with the length of the tubular section which is to be employed.

it further consists of a novel method of forming curved sections for ventilator terminals, wherein the blanks of material are first spun on a die to form curvatures in the blank and thereafter the blank which has thus been treated is reversed and placed on a die having a convex formation and. spun to the shape of such die, thereby forming a circular section, of semi-tubular form in cross-section with a centralconnecting portion. The central portion of the blank is then cut out. A second section is then made in a similar manner. The two sections ere then welded or brazed together to form an annular tube, which is thereafter cut preferably on radial lines, and the jux tsposed ends of curved tubular sections are then deflected to form annular end flanges. The flanges are then articulated by surrounding them with a band of any desired contour in transverse section, and as shown portion, such as for example wire mesh,

which covers the opening in the end section.

The bottom or inner section may consist of e straight or curved section and, as illusti'ated, consists of a straight tubular section, having an annular groove near one end,

thereby forming a flange which is articulated by means of a band with the end of a curved section. The straight tubular section is then provided with a damper, which is constructed and assembled in such a mannor that it will interlock with the inner peripheral wall of a section to maintain the damper in its adjusted position.

Other novel features will hereinafter more clearly appear in the detailed description.

For the purpose of illustrating one manner of carrying out my novel method in practice, I have illustrated herein one type of mechanism whereby a curved tubular section may be formed, but it is of course to be understood that such illustration is typical only of one manner of carrying out my in- "vention. and that the invention may be carried out by means of a variety of steps or mechanisms too numerous to illustrate or describe.

Figure 1 represents a sectional View of a die and a blank, illustrating the first step of the operation.

Fig. 2 represents a sectional view of a die and a blank as the parts appear in the next step of the operation.

Fig. 3 represents a plan view showing the parts as they appear after they have been welded together.

' Fig; 4 represents a sectional view on line fi.4 of Fig. 3, in order to illustrate more clearly that the parts are welded or brazed together.

Fig. 5 represents a sectional view on line 5-5 of Fig. 8 and on an enlarged scele showing more particularly the means to effect the locking of the damper. a

Fig. 6 represents a plan View of a finished blank after the central portion thereof has been cut out and before it has been welded to another section.

Fig, '7' represents a side elevation of completed terminal Fig. 8 represents a sectional elevetion oi? Fig. '27

Similar numerals of reference indicate correspondingrperts in the figures.

Referring to the drawings the In practice the terminal is usually made of sheet metal of a non-oxidizable character,

such as for example brass, and disks of the.

proper dimension are first cutout to form a sheet metal blank 1, (see Fig. 1)

2 designates a die which is used in the first step of the operation, said die having the outer flat face 3 at its central portion, which is provided with any desired type of fastening means, whereby the blank will be held in assembled relation with respect to the die 2. The die 2 is provided with the rearwardly directel concave wall 4, which merges into the laterally extending straight wall 5. The die 2 is secured to the rotating member of a lathe or other suitable machine in any desired manner, and-in order to illustrate one manner of accomplishing this result, I have shown the die 2 as being internally threaded, as at 6, to engage the threaded end of the lathe spindle.

Assuming now that the blank 1 has been fixed to the flat face 3 of the die 2, the lat:-

or other machine used to rotate the die is set into operation, and a tool of the usual character used in spinning is applied to the outer face of the blank 1 so as to cause it to amume the shape of the die 2, so that it is spun into close relationship with the curved wall 4 and the straight wall 5. The blank has now assumed the formation seen in dotted lines in Fig. 1, and as indicated at 7 in Figs. .1 and 2.

The die 2 is nowremoved from the lathe and adie 8 is then applied to the rotating element of the machine, provision being made therefor, in the present instance, by internally threading the die 8 as at 9. The die 3 has its outer face provided with a central flat face 10 and the annular convex face 11.

The blank 7 is now reversed so that the central portion thereof engages the flat face 10 and assumes the position seen in full lines in Fig. 2. The die 8 is now caused to revolve and the usual tool used in spinning is brought into contact with the outer face of the blank and causes the outer portion er the blank 7 to be brought into close engagement with the outer convex face of the die 8 and to assume the contour seen in dotted lines in Fig. 2, and as indicated at 12.

The central flat portion of the finished blank is then cut away at 13, and the blank has now assumed the shape seen in 3 having the flat edges 1% and 15, and terms a circular section of semi-tubular form in cross-section. Another blank is then taken and treated in a similar manner, and when two of the circular sections of semi-tubular term in cross-section seen in Fig. 6 have been formed, the edges 14 and 15 are brought together and welded or brazed, as indicated at it in Fig. 4:, so that an annular tube 1"? is formed, as indicated at Fig. 3. 7 This tube es is then transversely out, preferably on re,

are lines, as indicated at 18, to form sectorshaped curved tubular sections of the desired lengths. The ends of the sector-shaped curved tubular sections are then laterally deflected to form end flanges 19 and juxtaposed flanges articulated together by means of a band 20. The flanges 19 are preferably deflected, so that they will make practically a line contact with the band and eliminate in a large measure the friction which would be present if they contacted with the band throughout their juxtaposed surface.

1 preferably employ two sector-shaped curved'tubular sections 21 and a straight tubular section 22, which latter consists of a ring or collar which may be of the same or greater thickness than the thickness of a curved section and is provided at its outer end with an annular groove 23, thereby forming a flange 24 so that by means of a hand, such as 20, the flange 24: may be articulated with a flange 19 of a sector-shaped curved section. The straight tubular section 22 is provided with a damper 25 carried by trunnions 26. one of which is adapted to be manipulated in order to adjust the position of the damper. The damper is locked in its adjusted position by means of a semi-circular rod member 27, the ends of which are connected with the damper 25 and this semi-circular member 27 is provided with a desired number of grooves or notches 28 which interlock with an inwardly projecting lug or bar 29 on the inner periphery of the tubular section 22.

The outer end of the curved sections has united therewith in any desired manner, for example, by soldering, an outwardly flared tubular section 30 which forms an integral part thereof and which is provided with a forwardly extending flange 31, in which a peripheral groove 32 is spun, and the free end of such section 30 is spun into a head 33, it being understood that the part 30 of the section 21 has its inner end spun 1n-' wardly to form an oflset flange at. which can be welded or soldered to the curved section 21 so that the outer periphery of the sections form, when assembled, continuous curves irrespective of the manner in which the sections have been relatively adjusted. The end piece is next formed, which comprises a ring which is spun into a curved formation substantially angular in cross section, and provided with inwardly extending lugs 36, which are sprung over the head 33 and interlock with the walls of the groove 32 when the end piece is sprung into position.

The rin 35 carries a foraminons portion 37, forme in the present instance by a wire mesh, theouter periphery of which is soldered or otherwise connected to the inner periphery of the ring 35, which forms the end piece.

In accordance with my present invention, I preferably employ a plurality of curved pipe sections, which are articulated on a diagonal or radial line, as is indicated at 38, so that by means of two curved tubular sections, the mouth or outer opening in the ventilator terminal may be presented in any desired direction, as will be apparent to those skilled in this art.

It is also within the scope of my invention to form the circular sections, of semi-tubular form in cross-section, one of which is shown in Fig. 6, by casting the same in a mold or by stamping, which can be readily accomplished at a minimum cost, and when manufactured in large quantities, the semi-tubular parts would be preferably formed by stamping or pressing them into shape.

The parts of a tubular section are then united in the manner hereinbefore described to form an annular tubel'? (see Fig. 3), and the other further steps in the manufacture of the completed terminal are the same as those already described. It will be seen that in accordance with my present invention, the joint formed by adj acent tubular sections is made by bringing a band into assembled relation with respect to the juxtaposed end flanges of sections, so that each section is relatively movable with respect to the band. By such means, a double joint is formed, so that in case one of these joints becomes corroded or rusted and rendered immovable, the other joint can be used and the requisite adjustment of the terminal effected.

In devices heretofore employed of' this character, it has been customary to employ an ordinary stove pipe joint, which soon becomes corroded and is diiiicult of adjustment. The ventilator terminals are specially adapted to be used in connection with the ventilating systems of ships, although, as is apparent, they may be used in connection with any desired type of ventilating or other system, in which the end of a conduit is to be presented at different positions in order to collect or distribute the air to a desired point of utilization.

The bottom or base section is spun or stamped into shape and the sections are then united together in any -desired manner.-

The end section 30 and the ring 35 are preferably formed by spinning or stamping to a semi-tubular shape and then uniting two of such members.

The notch receiving portion of the member 27 preferably has its outer peri hery formed with a shorter radius in or er to permit it to ride over the lug 29 which engages when the damper is in closed position with the walls of the recess formed by the member 27 and the damper. The annular tube formed by uniting sections such as shown in Fig. 6 provides, when transversely out, curved tubular sections of desired lengths.

The sections are preferably buffed, plated and polished in any desired or conventional manner.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. The method of making tubular sections, which consists in forming blanks into sections each of which has a central portion and a circular portion, of semi-tubular form in cross-section, surrounding the said central portion, cutting out the central portions of said sections, uniting the said sections to form a tubular annulus, and cutting the annulus into tubular sections of desired lengths.

2. The method of making ventilator terminals, which consists in forming blanks into sections each of which has a central portion and a circular portion, of semi-tubular form in cross-section, surrounding the said central portion, cutting out the central portions of said sections, uniting the said sections to form a tubular annulus, cutting the annulus into tubular sections of desired lengths, and articulating the juxtaposed ends of sections.

3. The method of making ventilator terminals, which consists in spinning blanks into semi-tubular grooved members, cutting out the central portions of said members, uniting said members to form a tubular annulus, cutting the annulus into tubular sections of desired lengths, and articulating the juxtaposed ends of sections.

4. The method of making tubular sections which consists in forming two annular sections of semi-tubular form in cross-section, connecting the opposed edges of said sections, and cutting the tubular annulus thereby provided into sector-shaped sections.

BERNARD H. MORRIS.

Witnesses:

WILLIAM BURLINGHAM, MoG. LINTON. 

